Improvement in sealing dip-pipes of gas apparatus



JOHN R. FARNUM.

improvement in Sealing Dip-Pipes of Gas Apparatus.

Patented May 21,182.

UNITED STATES PATENT OEEroE.

JOHN R. FARNUM, OF WALTHAM, MASSACHUSETTS.

IMPROVEMENT IN SEALING DIP-PIPES OF GAS APPARATUS.

Specification forming part of Letters Patent No..127,035, dated May 21, 1872.

To all persons to whom these presents may come: through it. The valve shown at D has a con- Be it known that I, JOHN R. FARNUM, of oid-al form, and at bottom is provided with an Waltham, ot' the county of Middlesex and annular lip, d, to enter an annular groove, e, State of Massachusetts, have invented an Imencompassing thevalve-seat opening c. Wings proved Valve Apparatus for the 'Hydraulic f f j' f, projecting t'rom the outer surface of Main ot' a Gas-Retort; and do hereby declarethe valve and against the inner surface ofthe the same to be fully described in the following valve-chamber, serve to guide the valve in its specification and represented in the accompavertical mot-ions. The dip-pipe shown at Eis nying drawing making part thereof. connected directly to the bottom ot the valve Ot' such drawing, Figure 1 denotes a front and extends down through the opening c of elevation, and Fig. 2 a vertical section, of a the valve-seat, concentricaly therewith, there hydraulic main with my valve apparatus apbeing one continuous pzissage, g, extended plied to it. Fig. 3 is a top view and Fig. 4 a through the pipe and the valve axially of the side elevation ofthe valve, its guides, dip-pipe, two. The valve is connected to its stem or and furcated stem. rod G by two branches or arms, L IL, arranged The main feature of difference between my as shown, such stem at its upper end being apparatus and various others in use having jointed to a litter or lever, z'. what is termed a dip-pipe so combined with The object of the dip-pipe, when used with the valve that the two are movable together the valve and its seat, is to prevent bursting relatively to the valve-seat, and have one conor blowing up ot' the retort in case ofthe valve tinuous passage extending through them, is, being closed, as would be`likely to take place that I have a i'ree passage around the valve were there no means for the escape ofthe gas and dip-pipe and through the valve-seat, such from the retort into the main. passa-ge beingto enable the gas, when the valve Without the dip-pipe, should a careless atand dip-pipe are raised so as to draw the diptendant forget to openthe valve after having pipe out ot' the liquid ot' the main, to freely charged the retort, the gas generated and contiow through the valve-seat, aswell as through fined in such retort would be likely to take the valve and dip-pipe, thereby having two tire and explode, and burst the retort, all of passages for the gas instead of one, and thus which is well understood by makers of illumobviating the danger that would result were inating gas. the dip-pipe passage to be estopped by tar or I make no claim to any thing, arrangement, guinmy matter from the retort. The dip-pipe or combination, as shown in either ofthe Uniis liable to be thus choked, in which case the ted States Patents N o. 111,439 and 111,440, dip-pipe and valve have to be removed, and 117,602 and 119,135. In the two patents last the matter by which they may be clicked has named the di p-pipe and the valve are not conto be extracted by burii 1g it out or otherwise. nected and do not move simultaneously to- With my improvement, the dip-pipe is raised gether, as in my valve apparatus, nor is there withjthe valve, and on its being drawn out of any passage arranged around the valve and the liquid in the hydraulic main the gas from through its seat, as in my apparatus, my inthe retort has a chance to enter the main vention or improvement relating to my specthrough the dippipe, as Wella-sthrough the ial construction andarrangement of parts, as valve-seat, the. latter having but one passage shown and described. through it insteadof two or more, as is re- What I claim as my invention or improve quired when the dip-pipe is stationary and ment in the hydraulic mairrvalve apparatus fastened to or projects down from the valveis seat. Thepassageacaround the valve and through In the drawing, A denotes the hydraulic or Within its seat, in combination and arranged main and B the valve box erected thereon with the dip-pipe and valve connected togethand provided with the induction-pipe C to er and having a passage extending through Y lead from a retort. In the lower part of thet them, as described and represented. valve-box, Whose chamber or internal space a Witnesses: JOHN R. FARNUM. is cylindrical, there is a valve-seat, B. having R. H. EDDY, a single circular passage, c, leading down J. It. SNOW. 

